Tapping and reaming head.



W. M. NEGKERMAN.

TAPPING AND REAMING HEAD.

APPLICATION FILED NOV. 25, 19121 Patented Dec. 2, 1913.

3 SHEETS-SHEET 1.

' INVENTOR wwaw M Z 4, MM

W. M. NEGKERMAN. TAPPING AND RBAMING HEAD.

Patented Dec. 2, 1913.

3 SHEETS-SHEET 2.

W. M. NECKERMAN.

TAPPING AND REAMING HEAD.

APPLICATION FILED NOV. 25, 1912.

1,080, 1 1 9. Patented Dec. 2, 1913.

3 SHEETS-SHEET 3.

WILLIAM M. NECKERMAN, OF YOUNGSTOWN,

OHIO.

merino AND REAMING HEAD.

'- Specification of Letters Patent.

Patented Dec. 2, 1913.

Application filed November 25, 1912. Serial No. 733,246.

To all IF/1 outit may concern Be it known that I, \VILLIAM M. N'ncxnn- MAX, a citizen 'of the United States, residing it Youngstown, m the county of Mahoning and State of Ohio, have invented new and useful Improvements in Tapping and Beaming Heads, of which the following is a specification.

My invention relates to heads for tapping and reaming and has been devised especially for tapping and reaming pipe-couplings, but it is not limited to this purpose.

. It is the object of my invention to provide heads for tapping, or reaming, or" both, which can be attached to the spindle arranged and constructed to rotate the heads axially and feed them longitudinally; and to provide novel, means for projecting and retracting the threading dies, and for adiljnsting these dies for variations in the dithey may be securely ameters of the coupling-blanks.

My invention also includes a novel form of carrier for ,the reaming tools and the threading dies and novel means for controlling the movements of the dies whereby locked during the threading operation and may be readily released and retractdat the close of this operation. Other objects will appear in the description.

Referring to the accompanying drawings,

.. Figure 1 is a central longitudinal section of a threading and reaming head embodying my invention; Fig. 2, a horizontal section cross-section on the line on the line II II, Fig. 1; Fig. 3, a horizontal section on the line IIIIII, Fig. 1' Fig. 1, a side View of a portion of the head; Fig. 5, a side elevation, showing a development of a portion of the rings for operating the threading dies and for locking and releasing the same; Fig. 6, a side elevation of the upper ring shown in Fig. Fig. 7 a VIIVII, Fig. 1; and Fig. 8, an elevation of two cotiperating heads, together with 7 connected and cooperating parts, portions being in section.

11 the drawings, 1 designates-the frame l of the threading and reaming head having 1n its lower or free end a series of radial slots 2 extending upwardly to the line 3 and from the exterior of the frame to the central opening 4, which extends downwardly to the bottom of the frame. The opening 4.- has the contracted upward extension 5, and the still more contracted extension 6 immediately above the extension 5. 'The slots 2 have upward extensions theirlower ends of the nut 17 7 co1nmunieating with the opening l. The said extensions have equal heights. corresponding to the up and down travel of the cone-shaped adjusting head 8, which has the main portion of its body lying in the opening 4 and its upper contracted portion 9 extending through the extension 5 and into the extension (3, which latter extension guides the said extension 9.

The head 8 is provided at its sides with v the radial guide-ribs 10 having their upper ends guided in the extension slots 7 and preferably spaced slightly from the plane of the bottom of the head 1 so as to leave the space 11. The ribs 10 are inclined inwardly and downwardly and have each an open guide-slot 12 extending along one side thereof parallel withthe outer face of the ri containing the associated guide-slot. 13 are the threading dies fitting the radial slots 2 and having the external thread-cutting teeth 14:. The top of the dies 13 are guided horizontally by the walls on the said line 3 and their bottoms are flush with the bottom of the head 1. The dies 13 are inclined so as 12 in the ribs.

The head 8 has between the main body thereof and the extension 9 the threaded portion 16 on which the adjusting nut 17 works, the nut' lying in the opening 4. It is provided with a series of radial holes 18 to receive the handle 19 which extends out through the slot 20 or 21 beyond the outer face of the head 1, as shown in Fig. 3.

The collar 22 surrounds the extension 9 and has a larger and spaced from the top of he opening 4 by a distance equal to the height of the extensions 5 and 6. The upper contracted portion of the collar 22 is adapted toenter the extension 5.

The radial bar 23 lies in notches in the top of the collar 22 and has its reduced ends lying in notches 27, in the bottom of the rotary ring 24 fitted about a reduced portion 25 of the head, having the radial slot- 26 to permit the bar 23 to travel up and down with the head 8. 1

The ring 28 lies above the ring 24 and in alinement therewith, and rotates on the portion 25 of the head 1. The upper end of the ring 28 bears against the bottom of opening, contalnmg the entire the opening from the cover-plate 36 which is secured by the bolts 37 to the bottom of the head 1 and forms a bottom guidefor the dies 13. The screw- 38 works in the v for preventing the rotation plate and engages a plate 39 the lower end of the spring rests. By turnon which ing the screw 38 the tension ofthe spring may be adjusted.

The upper edge of the ring 24 has several teeth 40.having their left-hand walls 41 perpendicular to the ring and the right-hand wall 42 inclined to the bottom of the next v tooth. The apex of each tooth is beveled at the angle of 45 with the right-hand wall of the tooth. The bottom edge of the same number of teeth 40 as right-hand wall ring 28 has the the ring 24, the 41 of each tooth being perpendicular to the ring 24 and the left-handwall 42 being inclined. to the base of the next tooth, the inclination of the wall '42 of the two rings being parallel, or having the same. angle with regard to the wall 41. The apex of the tooth 40 of the ring is also beveled atthe angle of 45 with the wall 41 of the ring 28.

When the tool-head is ready for work the parts areas shown in Figs. 1 and 5, the two beveled portions a of adjacent teeth on the two rings 24 and 28 being in engagement as shown on Fig. 5. The spring 39 tends to push the ring 24 upwardly and would push the same upwardly if there were no means of the ring 28, because, if the ring 28 were free to rotate the beveled portions (1 on the teeth 40 would wedge or cam the ring 28 to the left until the walls 41 of the said teeth came into alinement, whereupon the spring 39 would push up the head 8, the ring 17, the collar 22, the bar 23 and the ring 24 until the teeth 40 on the rings-24 and 28 interfit and the lower walls 42 engage the upper walls the movement of the head 8 upwardly the dies 13 were caused to move inwardly as is required at the close of a threading operation to permit the tool-head to be wlthdrawn from the hole threaded thereby. The ring 28 has the handle 43 by which it may be turned. If the ring 28 be turned to the left, the contacting wall 42 will force the coiled expansion I engagement with each other.

the lower ring 24, the bar23, the collar 22, the ring 17, and the head 8 downwardly, thereby causing the dies 13 to be projected to theirworking position, at which timethe surfaces. (1 of eo-acting teeth will engage each other, further movement of the ring to the left after the surfaces at engage being prevented by the dog 44. This dog has radial movement in the tube or casing 45 inserted in the opening 46.in the ring 28. A spring 47 presses the 5 dog inwardly and has 7 its outer end restrained bythe cap 48 on the casing 45. The spring surrounds the stem 49 attached to the outer end of the dog and extending through the cap 48. The bellcrank 50 has its angle pivoted to the arm 51 on thecap' 48 and its inner arm pivoted to the stem 49. The outer arm of the lever 50 is provided with a roller 52 which may engage with a fixed projection 52' to cause the outer arm to be raised and the dog to be withdrawn from engagement with the radial wall of one of the notches 53, when the threading dies have entered the coupling- -blank 53 the desired depth. 7

- The outer end of the bell-eranle50 may be raised. by hand, if desired,"to' withdraw the dog 44. When the beveled portions a coincide, the dog 44 has reached the radial or stopping end of one of the notches 53 in the periphery of the portion 25 of the frame 1,

so that the pressure of the spring 35 cannot rotate the ring to the left to permit the teeth 40 to interlock with their walls 42 in The periphery of the frame 1 somewhat above the bottomthereof is provided with radial slots 54 open at their outer sides and top ends. In these slots 54 are the reamers 55 having their lower ends beveled inwardly toward the bottom of the slots as at '57, their intermediate portions 58 parallel with the 1 axis of the head, and their upper ends rovidediwith the radial projections 56 w ich engage the edgeof the coupling-blank 53 at the endof the threading operation. The dies 13 thread the coupling-blank from its ends inwardly to predetermined depths fixed by the action of the lever 50 or the projections 56. The portions 57 and 58 of the 11; reaming cutters cut away the threads made by the dies 13 making the interiors atthe ends of the pipe-couplings smooth and somewhat larger than thethreaded portion of the coupling, thereby giving the interior of the 1 2 finished coupling itsusual shape. The cutters' 55 are clamped in place by the ring 59, which restson their upper ends, the ring be-- ing spaced from the frame beneath it to permit the ring to bear on the cutters after their 12 lower ends have been ground off to compensate for the grinding away of the beveled portions 57 for sharpening the cutters.

The radial position of the dies 13 may be adjusted by rotating the nut 17 by means of 1:

the handle 19, but the handle 19 can be turned only when the head 8 is in its upper position, because the slots 20 and 21 are connected at their upper ends and not at their lower ends (Fig. 4 When the head 8 moves up in the opening 4-, the handle '1!) moves upin the slot 20 or 21. When the handle reaches the top of its slot, it may he moved across to the top of the other slot, if this lTIOYOmtHtwill give the desired adjustment of the head 8, and the handle can be taken out of the top of the latter slot, and placed in another hole 1S.at the top of the other slot, and the nut turned still farther, if the first movement of the handle was not suflicient. The holes 18 are spaced so that conseeutiveholes 18 can register at the same time with the slots 20 and 21, so that the handle can be removed from one slot and hole 18, and placed in the adjacent slot and hole. The nut 17 can be successively moved by changing the handle to successive holes and moving it across from one slot to the other, so as to obtain the desired adjustments of the head 8 and the dies 13. The space 11 permits the head to be adjusted downwardly.

Fig. 8 shows the coupling-blank 53 threaded and reamed at its lower end by the lower head. By retracting the lower head the upper head can be lowered to thread and ream the upper end of the blank. The heads have the telescopic projections 36' and 36 to keep the heads in alinement, and are covered by my application, Seria. Number 733,945 filed November 25, 1912.

I claim 1. In a tap, a frame, threading dies ha"- ing radial movement therein, a head having longitudinal movement on the frame and connected to the inner edges of the dies so as to move the dies radially as the head moves longitudinally, a spring in the head exerting a pressure tending to move the dies radially, cooperating rings, each provided with a plurality of opposing cam teeth, one ring being movable on the other for moving the head against the action of the spring, and means for releasably lockingthe movable cam when the dies have been projected thereby to their working positions.

2. In a tap, a frame, threading dies having radial movement therein, a head having longitudinal movement on the frame and connected to the inner edges of the dies so as to move the dies radially as the head moves longitudinally, a spring in the head exerting a pressure tending to move the dies radially, and cooperating toothed cam rings rotatable transversely of the head, one cam ring being movable on the other for moving the head againstthe action of the spring, the said spring having one end reacting against the front end of the frame.

consequently, of l 3. In a tap, a frame, radially nim'able threading dies carried thereby, a head for moving the dies radially, a spring tendin; to retract the dies, a fixed cam and a movable cam cooperating therewith and with the head to operate the head in opposition to the spring, the cams-having inclined surfaces arranged to hold the. dies in working position and tending under the action of the spring to move the movable cam to a position to release the head from the holding action of the inclined surfaces, and means for releasably locking the movable cam When. the said inclined surfaces are cooperating to hold the dies in workingposition.

4. In a tap, a frame, radially-lamable threading dies therein, a head movable at an angle to the movement of the dies, a nut adjustable 'longitudinally on the head, a sping tending to force the head in a direction to cause a retraction of the dies, and means bearing on the nut and acting to hold the dies in threading position against the force of the spring.

5. In a tap, a frame, radially-movable threading dies therein, a head movable at an angle to the movement of the dies, a nut adjustable longitudinally on the head, a spring tending to force the head in a direction to cause a retraction of the dies, means bearing on the nut and acting to hold the dies in threading position against the force of the spring, and means preventing the rotating of the nut when the dies are in threading position.

6. In a tap, a frame, radially-movable threading dies therein, a head movable at an angle to the movement of the dies, a nut adjustable longitudinally 0n the head, a spring tending to force the head in a direction to cause a retraction of the dies, means bearing on the nutand acting to hold the dies in threading position againstthe force of the spring, and a handle for the nut extending outwardly from the frame and movable .in a longitudinal slot in the frame and in a transverse slot therein communicating with the longitudinal slot, the handle being at the closed end of the longitudinal'slot when the dies are in tl'n-eading position and in line with the transverse slot when the dies are retracted.

7 In a tap, a frame having a U-shaped lateral slot with the legs thereof extending toward the free end thereof. a head movable longitudinally of the frame, threading dies operatively connected to the head, means including a nut. adjustable on the head, for holding the head with the dies in their war-king position, the nut having in its periphery a series of holes spaced apart to correspond with the distance between the legs of the U-shaped slot, and a handle in one of the holes in the nut, and at the closed end of one of the legs of the slot when the dies are retracted and in line with the transverse member of the slot when the diesiare retracted.

8. In a tap, a rotatableframe having an axial opening, radial slots communicating therewith, and a transverse slot, threading dies in the radial slots, a longitudinally movable head inthe axial opening to actnate the dies and hold themin their threading positions, a collar carried by the head, a crossbar ,reciprocable longitudinally of the frame and in the transverse slot, a ring around the frame and on the ends of the bar, the ring having inclined teeth 011 its ed e opposite the bar, a rotary ring having inclined teeth fitting the teeth on the other ring, a spring pressing the first ring toward the second ring, the apices of the teeth having contacting surfaces inclined transversely of the inclination of the teeth, whereby the spring tends to rotate the second ring so that its teeth may pass the teeth on the first,

and permit under the action of the spring the teeth-to move into intermeshing engagement and the dies to be retracted, a dog c0- operating1 with the notches in the frame to prevent tie rotation of the second ring, and means for withdrawing the dog from any notch in which it may rest.

9; In a tapping and reaming device, a

rotary frame, a series of radiallyrarrangedthreading dies therein, a series of radially arranged and longitudinally disposed reaming cutters having the ends nearest the dies supported on transverse walls in the frame, a clamping ring resting on the other ends of the cutters, and meansfor drawing the ring against the last-named ends of the cutters and toward the said transverse walls. Signed at Youngstown, Ohio, this 21st day of November 1912. WILLIAM M. NEOKERMAN. W'itnesses JOHN J. CoNNER, CHARLES W. KEEFER. 

